Summarising for the purpose of pinning:
If there is a #Wikipedia article about you (in any language) which has an unflattering photo of you, or if it doesn't have a photo of you at all, you can fix this! The quickest solution is to take a good photo of yourself â copyright of photos belongs to the photographer, so a selfie simplifies the process. You can also use a photo that someone else has taken if it has an appropriate licence.
Photos and media files are uploaded to #WikimediaCommons so they can be used in any Wikipedia or other #Wikimedia project. All text and media content on Wikimedia projects must have a public domain or free content licence. We prefer CC-BY-SA and CC0. These licences are irrevocable and cannot restrict where or how they are used.
https://commons.wikimedia.org/wiki/Commons:Licensing#Acceptable_licenses
https://wiki.creativecommons.org/wiki/Considerations_for_licensors_and_licensees#Considerations_for_licensors
If you don't have a Wikipedia/Wikimedia account, you can post a photo here on the fediverse and a Wikipedian can upload it for you. Post the photo along with the licence declaration in the same post (Mastodon, GoToSocial, etc) or in the caption (Pixelfed).
CC-BY-SA declaration:
I agree to publish this image under the Creative Commons Attribution-ShareAlike 4.0 International licence.
CC0 declaration:
I agree to publish this image under the Creative Commons Zero Public Domain Dedication 1.0 licence.
Tag this post with #Wikipedia and #WikimediaCommons so an editor is likely to see it.
More info at https://en.wikipedia.org/wiki/WP:PICYOU
Edit: posted to my blog at https://www.claudinec.net/posts/2025-12-23-wikimedia-photos/